Apparatus for cooling a



(No Model.) 2 Sheets-Sheet 1 E. P. HODGBS.

APPARATUS FOR GOOLING AIR POR RBPRIGERATING AND OTHER PURPOSES.

No. 331,881. Patented. Dem 8, 1885.v

(No Model.) 2 Sheets-Sheet 2.

H. P. HODGES.

APPARATUS POP. GOQLING AIR POR REPRIGBRAPING AND OTHER PURPOSES.

No. 331,881. Patented. Deo. 8, 1885.

N. Pneus. Pnnwumgmp'm. waaaangnm n. c.

iTED STATES PATENT Erica HORACE F. HODGES, FITCHBURG, MASSACHUSETTS.

APPARATUS FOR COOLING AlR FOR REFRlGERATlNG AND OTHER PURPOSES.

SPECIFICATION forming part of Letters Patent No. 331,881, dated December8, 1885.

Application filed July 7, 1885.

T0 all whom, t may concern:

Be it known that I, HORACE F. HonGEs, of Fitchburg, county of.Voicester, and State of Massachusetts, have invented a new and ImprovedApparatus forCooling Air for Refrigerating and other Purposes; and Ihereby declare the following to be a full, clear, and exact descriptionot' the same, reference being had to the accompanying drawings, makingpart of this specification, in which- Figure l is a side elevation ofthe apparatus, showing cooling-coils in elevation and their surroundingeasing in section. Fig. 2 is a plan view oi' the apparatus.

My invention relates to that class of cooling apparatus wherein ammoniaor other highlyvolatile gas is vaporized to absorb heat from a passingcurrent of air to cool it for refrigerating and other purposes.

My invention consists in certain details of construction and arrangementet' apparatus, as is hereinafter fully described, and specific allypointed out in the claim, whereby a high degree of rapid absorption ofcaloric from the passing current of air is attained.

In order that those skilled in the art may make and use my invention, Iwill proceed to describe the manner in which I have carried it out.

In said drawings, A is an iron or other casing, containing within itswall proper insulated media, and in which are arranged one or morecoils, a b, each having an end con.- neeted at b b to a manifold, B,which forms the termination of a gas-supply pipe, B, from Which theliquid gas is fed to the coils. The coils a b are pitched in oppositedirections and have their exit ends connected with a manifold, C,forming the termination of pipe D. The gas is supplied and vaporizedthrough the coils after the manner well known in such apparatus. Fromthe opening in the center ofthe top of the casing A passes an air-supplypipe, E, having its outer end terminating in a fan-blower, F. At desireddistances from the center of the top or bottom of the casing there areopenings e e, at which points are to be connected, if desired, pipes toconduct the cool air to required points.

The fan-blower forces the air through the airsupply pipe E, down throughthe center of the coils, whence it turns and passes ups wardapproximately near the sides of the casing and escapes through openingse e to the points or point of utilization.

A serious difiiculty heretofore existing in machines of the class hereindescribed has been that the moisture in the air forced into the casingwould be deposited as frost or ice on the cooling-coils a b, and theninterpose, as it were, an insulating medium between the passing air andthe surface of the pipes. To avoid this trouble, I coat or cover theexterior surfaces of the cooling-pipes a b with a non-congealablematerial, which will not interfere with the rapid absorption of caloricfrom the air, and upon which the frozen moisture will not be deposited.

I prefer to cover the pipes with a non-eon Y gealable mixture consistingof petrolina, one pint; salt, one pint; glycerine, one pint.

It may be desirable to take lthe air from the bottom of the condenser,instead of from the top, as shown in the drawings.

Having thus described my inventiomwhat I claim as new, and desire tosecure by Letters Patent, is-

The casing A, provided with the outletopenings e e and a centralopening, gas-supply pipe B B, coil-pipes a 1J, and out1et-pipe C D, incombination with the pipe E and the blower F, all constructed, arranged,and operated substantially as and for the purpose set forth.

HORACE F. HODGES. Witnesses:

G. L. STEARNs,

M. F. JoNEs.

